Pay specific attention to the concept of "valence." In expectancy theory, one of the more important variables in motivating people is the social context.

Expectancy theory is a common motivational theory postulating that people often are more motivated when they project a positive outcome from their work. ... Valence with Change.

Expectancy Theory. The questions above ... In contrast, the choice to remain or leave a job in general was more related to expectancy (.38) than valence (.27) or instrumentality (.27).